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Hi Zbigniew,<br class="">
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<blockquote type="cite" class="">
<div class="">On 16 Jul 2021, at 5:08 am, Nitecki, Zbigniew H. <<a href="mailto:Zbigniew.Nitecki@tufts.edu" class="">Zbigniew.Nitecki@tufts.edu</a>> wrote:</div>
<br class="Apple-interchange-newline">
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<div class="">
<div class="" style="word-wrap:break-word; line-break:after-white-space">I designed a small macro to draw a “tear”-shaped curve using \psbezier. It works as expected.
<div class="">For simplicity, I wrote it with features related to the coordinate axes.</div>
<div class="">Then, I tried to create a new macro, “blip”, which gives a translate of this picture to a specified position.</div>
<div class=""><br class="">
</div>
<div class="">I tried two options (see attached example) .</div>
<div class="">In the pdf, the lower figure is generated using just the \tear macro, while the upper one is generated using the \blip macro.</div>
<div class="">The \blip figure has some extra lines—I suspect they are caused by my use of \pscustom to create the translated picture. </div>
<div class=""> I followed the example on p. 130 of Herbert Voss’s “Pstricks” (in the English translation).</div>
<div class=""><br class="">
</div>
<div class="">I thought I could get away with just defining \blip using \tear without a \pscustom envelope, but if I comment out the \pscustom part like this:</div>
<div class="">
<blockquote type="cite" class="">
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>\newcommand{\blip}[5]{%\pscustom{% usage:\blip{A}{B}{a}[b}{c} = \tear{a}{b}{c} moved so (0,0)->(A,B)</div>
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>\translate(#1,#2)</div>
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>\tear{#3}{#4}{#5}</div>
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
%<span class="x_Apple-tab-span" style="white-space:pre"> </span>}<span class="x_Apple-tab-span" style="white-space:pre">
</span></div>
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>}</div>
</blockquote>
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<div class="">
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
I get an error message, that \tear is undefined (it is still present in the file, preceding this definition).</div>
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<br class="">
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<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
Can anyone suggest how I can translate the picture generated by \tear without introducing the extra lines? I know this is probably a pretty stupid issue, but I haven’t succeeded in understanding how to</div>
<div class="" style="margin:0px; font-stretch:normal; font-size:12px; line-height:normal">
do it from the LaTeX Graphics Companion (there is a complicated example involving creating nodes, etc., surely there is an easier more direct way).</div>
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</blockquote>
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<div>This does what you want:</div>
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<div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">\begin{pspicture}(-5,-5)(5,5)</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\tear{1}{5}{7}</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\pscustom{\translate(3,3)</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\psbezier(1,-1)(0,0)(0,0)(-5,0)}%</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\pscustom{\translate(3,3)</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\psbezier(-5,0)(-7,0)(0,7)(0,5)}%</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\pscustom{\translate(3,3)</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>\psbezier(0,5)(0,0)(0,0)(1,-1)}%</div>
<div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">\end{pspicture}</div>
<div class=""><br class="">
</div>
<div class="">So the lesson is that you need to wrap \pscustom {\translate (…} }</div>
<div class="">around *each* of the Bézier pieces separately.</div>
<div class=""><br class="">
</div>
<div class="">Probably what is happening is that the origin (or whatever is the currentpoint at the time)</div>
<div class="">is regarded as part of the Postscript path, giving you an extra straight segment at the beginning </div>
<div class="">or end of a Bézier piece. </div>
<div class="">That is, within a single \pscustom{ . . . } the different Bézier pieces combine to give </div>
<div class="">a single Postscript curve specification, drawn at the end.</div>
<div class=""><br class="">
</div>
<div class="">By breaking up the pieces into their own \pscustom {…}</div>
<div class="">you draw each piece entirely independent from the others.</div>
<div class="">(so no automatic connection between the pieces.)</div>
<div class=""><br class="">
</div>
<div class="">It is then up to you to make sure they fit together seamlessly.</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Oh, and move the \newcommand definitions outside of the {pspicture}</div>
<div class="">environment; else you have to repeat them each time you want them.</div>
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</div>
<div class=""><br class="">
</div>
<div class="">Hope this helps.</div>
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<div><span class="Apple-tab-span" style="white-space:pre"></span>Ross</div>
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<blockquote type="cite" class="">
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Zbigniew Nitecki</font></div>
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<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Department of Mathematics</font></div>
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<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Tufts University</font></div>
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<span id="cid:A1B629E12CEDE74B9B878D28C4758AE8@namprd05.prod.outlook.com"><Beziertest.tex></span><span id="cid:1660e2ee-f2df-4f7f-b7fa-08bbbba409b4@namprd05.prod.outlook.com"><Beziertest.pdf></span>----------- Please Consult the Following Before Posting -----------<br class="">
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<div class=""><br class="">
Dr Ross Moore<br class="">
Department of Mathematics and Statistics
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T: +61 2 9850 8955 | F: +61 2 9850 8114<br class="">
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Provider Number 00002J. Think before you</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">print. </span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">Please
consider the environment before printing this</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">email.</span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">This
message is intended for the addressee named</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">and
may </span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">contain
confidential information. If you are not the</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">intended </span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">recipient,
please delete it and notify the sender. Views</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">expressed </span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">in
this message are those of the individual sender, and</span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class=""> </span><span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">are
not </span><br style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none;" class="">
<span style="font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; text-decoration: none; float: none; display: inline !important;" class="">necessarily
the views of Macquarie University.</span> </span></span></span></span></span></a></span></div>
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